Wax-extractor.



WILIAM J. BBIZIUS, OF I'OS ANGELES, CALIFORNIA.

WAX-EXTBACTOB.

Specification of Letters Patent.

Patented May 25, 1915.

Application flled ;kumamv 9, 1915.l Serial No. 1,474.

To HZZ whom z't may-concern: I

Be it known that I, WILLIAM J. Bmzrcrs,

a citizen of the United States, residingat' Los Angeles, inthe county ofLos Angeles and 'State of California, have -invented 'a new and 'useful'Wax-Extractor, of lwhich the following is a specification'.``

My inven-tion relatesf'to dental instruments, and especially' toinstruments usedv for removing excess Wax from Wax impressions used inold inlayzwork. In such Work' e' inlaid is first shapedso that' it Willprovide'a proper support for the in-' the cavity to lay, and thiscavityis then filledv With Wax; the projecting portion of thewax' beingrounded out to 'conform tothe v'original shapel of the tooth. TheWaximpression'is then removed' andf'is used as a pattern vto form a moldin which the gold inlay is east,

the go'ldfinlay When finished being the same' size and shape' as theWax-impression orfpatterm" The inlay is 'then cemented into'v thecavity.

The principalobjectof thel invention--is to' provide an instrument' byWhich'small -portions of Wax may'be removed' frornthe i proper 'lookingand Wearing quali-ties on accounti'of the actual costj of the-.golditself:

With my invention lanydesiredamount .of Wax may be' removedfrom theimpression so vthat on'ly 'a shell' of gold is produced, this shellbeing filled With and embeddedin 'cement' When in place.

f As it takes 'some time to prepare Wax impressions,-and 'they' aretherefore 'valu'a'ble;` it i's very necessaryl thatan'y instrument'intendedifor the 'above purposefbe soconstructed that the operator Willnot beilikely to injure'the 'impression in removing superfluous Wax andso that the amount-'of Wax removedcan be reg'ulatedv exactly.

A furth'en object of' my invention' is zto provide a Wax :extractor bywhich *small particlesof Wax. may be' 'removed -from -an impressionlwithout dangerV of Yinjuring-the impression,v the operator havingcomplete control'of the amount of Wax removed at all' times.

Further' objects and advantages Will .be evidenti hereinafter.

In the' annexed draw'in'g, Which is for illustrative' purposes onlyFigure 1 is a side view of'the Wax extractor With its connecting Wiresand tubing shown broken off. Fig. 2 is an en-larged section on the planewL-wz'of Fig. 1. Fig. 3 is a further enlarged section on thepla-ne:va-wa of Fig. 2. Fig.' .4 is a similarly'enlarged section on the plane":nt-m4 of Fig. 2.

As illustrated in the draWing, the extractor consists of a central metaltube 11 Whichfv has'a head 12 brazed into the for- Wa-rd' end thereof,the head 12 having an extraction tube 18, which is preferably ofsilver,'bra'z'edtherein. Th'e extracting tube 13 is provided-With acentralopening 14 Which communicates With a cylindrical openingl 15Which extends completely through the center of the metal tube ll'fromthe head 12 to the -rear end 16. Mica insulation 17 is Woun'd'on themetaltube 11, and an electric heating element' 18 i'is Wound on themica, being-insulated'fromthe metal vtube 11 by the mica.- A layerof'asbestos 19 is placed over the heating element 18,' and a shell 20 issecured over 'the asbestos -19 as shown in Fig. 2, and seeured' to 'a'plug 21 by a set screW 22. The shell 20 is `preferablyv formed ofinsulatingmateriaL'- Th'e plug 21 isslipped over the' metal tube 11 andis secured in place on the-tubeby'means' ofa set'screw 22', the plug-21having 'a projectionextending inside' Vthe-'shell 20 .for 'supportingthe shell 20 at`-the`E rear i end. Wires 23 and 24' pass through theplug 21 and communicate With the heating-element 18, the wires 28 and 24being externally connected to' any suitable source pf' electric =power`through any suitable' switch.:

A metallic band'25--slides over the junction of the shell 20 and theplug 21. A flexible'tuber 26' is securedover'the end 16 of the metaltube 11 and the) internal opening l27 inthat'tube is in'open'communication With the opening 15 offthe'tube 11. A Wire member 28has'a hand1e'293formedat one end, and has curved ortions 30 and 31 soshaped that they grip tlie' internal Walls of the tube 11 Whenthe Wire'28 is pushed therein. A small bodyT of absofrbentv cotton 32 is tWistedabout'fthe'end 'of the'-'wira'=-28j'and rests in the opening 15 close tothe extracting tube 13. p

The method ofoperation of the invention is as folloWsz-The tube 26 isconnected to any suotion means so that a slight vacuum is produced inthe opening 27 and in the opening 15 inside the metal tube 11, thisvacuum being constantly relieved by an infiow of airthrough the opening14 in the extracting tube 13. Electric current being supplied throughthe wires 23 and 24, flows through the wires forming the heating element18, and heat is generated therein. This heat is conducted through themica 17 to the tube 11, and this heat is conducted by the metal tube 11to the head 12 and to the ex- Wax, the Wax is melted by contact With theextracting tube and becomes liquid. The constant flow of air inwardlythrough the opening 14; draws the melted Wax through the opening 14 intothe opening 15 inside the metal tube 11. This Wax fiows along theopening 15 and is finally absorbed by the cotton 32. At intervals thetube 26 is removed from the metal tube 11, and the Wire 28 and theabsorbent cotton 32 are removed from the opening 15, fresh cotton beingse- 4d cured to the Wire 28 as needed.

.I have found that it is possible by using my extractor to carve awayvery small por- `tions of Wax and to maintain an absolute control of theamount of Wax removed at 'any time. By the use of my Wax extractor, Ican cut the walls -of the Wax impression down to an almost paperthinness Without in any Way affecting the external shape of theimpression. lT can produce looking grooves or' cavities inside theimpression into which the cement is forced when the tooth is .put inplace. After the impression is suitably modified by the use of my Waxextractor, the gold inlay may be produced therefrom by any one of theseveral Well known methods.

My invention should not be confused With the various devices in commonuse in dentists offices .for heating air before it is forced from anorifice; Such devices cannot be used as my invention is used due to thefact that the heated Wax is forced out lagainst cold portions of theimpression adlhering thereto and materially changing the niaaeco meansfor drawing the heated Wax through said opening away from said point.

2.-A Wax extractor comprising a handle, a small heated metal pointcarried insaid handle and having an opening therein, means for drawingthe heated Wax through said opening away from said point, and absorbentmeans adjacent to said point for' collecting and retaining the heatedWax.

3. A Wax extractor comprising a metal tube, means for heating said tube,an extracting tube having a small opening therein secured in said metaltube, the opening in the extracting tube communicating with the interiorof the metal tube, and means for causing a partial vacuum in theinterior of the metal tube.

4. A Wax extractor comprising a metal tube, means for heating said tube,an extracting tube having a small opening therein secure'd in said metaltube, the opening in the extracting tube communicating with the interiorof the metal tube, means for causing a partial vacuum in the interior ofthe metal tube, and absorbent means in said metal tube for collectingand retaining the melted Wax drawn into said metal tube through saidextracting tube.

5. A Wax extractor comprising a metal tube 'having an extracting tubesecured in one end thereof, said extracting tube having an openingcommunicating With the interior of said metal tube, insulating materialwound on said metal tube, an electric heating element wound on saidinsulating material, means for supplying electricity to said heatingelement, and means for causing a partial vacuum in the interior of saidmetal tube.

6. A Wax extractor comprising a metal tube having an extracting tubesecured in one end thereof, said extracting tube having an opening`communicating with the interior of said metal tube, insulating materialwound on said metal tube. an electric heating element Woundon saidinsulating material, means for supplying electricity to said heating"element, means for causing a partial vacuum in the interior of saidmetal tube,

and absorbent means inside saidmetal tube for collecting and retainingthe heated Wax drawn into said metal tube through said extracting tube.

7. A Wax extractor comprising a metal tubeohaving a small end and havingan opening -extending longitudinally through said tube and said end,.,an electric heating element wound on said tube and insulated' 1,14o,eeo

thererom, means forisupplying eleetricity to said heating element, ashell for protecting said heating element, and means for causing apartal Vacuum inside said tube.

8. A Wax extractor eomprising a metal tube having a small end and havingan opening extending longitudinally through said tube and said end, anelectric heating element Wound on said tube and insulated therefrom,means for supplying electricity to said heating element, a Shell forprotecting said heating element, means for causing a partial Vacuuminside said tube, and removable absorbent means in said tube forcollecting and retaining the melted Wax drawn into said metal tube bysaid vacuum.

In testimony whereof, I have hereunto set my hand at Los Angeles,California, this lth day of January, 1915.

WILLIAM J. BRIZIUS.

In presence of- FoRD W. HARRIS, FEED A. MANSFIELD.

